Chaeles schtjetz



( No Model.)

0. SOHUETZ.

I WATCH CASE. No. 296,681. Patented Apr.- 8, 1884.

Nv PETERS, Pheln-Lnhugnphar, Washingflm. D. C

Umrr STATES rrrnnr @rrrcn.

CHARLES SOHUETZ, OF NEWARK, NEW JERSEY.

WATCH-CASE.

SPECIFICATION forming part of Letters Patent No. 296,631, dated April 8, 1884:.

Application filed December 6, 1853. (N0 model.)

To (LZZ whom it may concern Be it known that I, CHARLES Sonunrz, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented new and useful Improvements in atch-Gases, of which the following is a specification.

My invention refers to improvements in watch-cases; and it has for its object to pro vide convenient means for opening the backs or fronts of such cases. I attain this object by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a view of the back of the watchcase with the covers open Fig. 2, a section of the stem and body of the case; and Figs. 3 to 7 represent details enlarged.

Similar letters refer to similar parts throughout the several views.

I11 Fig. 1, A is the body of the watch-case; B, the front cover; G, the inner and D the outer back cover; E, the ring; F, the knob, and G a sleeve, of which Fig. 3 is a detailed view in perspective. knob F; b, a small screw, the head of which is within a groove or slot, m, of the sleeve G. c and dare small steel lugs attached to the covers 0 and D, and passing into slots 0 (1 when the covers are closed.

Fig. 6 is an elevation of the hollow stem H, forming part of the case A. This stem H has two slots, 9, diametrically opposite, which slots are also shown in Fig. 4.. It also has a threaded hole, 0, for the above-mentioned small screw b. The knob F is shown enlarged in Fig. 7, together with the shank a. This shank a has a flange, e, an annular recess being formed between this flange e and the shoulder f on the knob F, into which recess the inner end of the screw 1) projects. To the square end of the shank a the usual means for winding are 0011- nected.

Fig. 5 shows a hollow cylinder, I, with two cams, t and k, and with two lugs, Z. A ring, J, Figs. 2 and 4, with two projecting arms, fits on the outer end of the cylinder I, the lugs Z entering corresponding notches of the ring J.

a, Fig. 2, is a spring such as generally used in catclrcases for locking and opening the front. This spring a has a hole, through which the inner end of the cam-cylinder I passes, the Shoulder j of which rests on the spring.

a is a shank attached to the' inner cam, it, placed upon the square end of the cylinder I. The sleeve G is passed over the hollow stem H, the projecting arms of the ring J enteringthe notches h ofthesleeve. Aspring, S, is placed into the annular groove of the knob F, the ring E turned down, and the shank a passed into the hollow stem II and into the cylinder I to the position shown in Fig. 2.

Finally the small screw b is passed through the slot in of the sleeve G, and screwed into the hole 0 of the stem H far enough for its inner end to project into the annular recess of the stem to between the knob and the flange 6, while the head of the screw is within the slot at of the sleeve G. The notches g are wider than the ring J and its arms, so as to allow small longitudinal motion of the ring. J. The sleeve G can be turned and also moved longitudinally on the stem H, the extent of both motions being limited by the slot in of the sleeve G and by the head of the screw 1). WVhen the sleeve G is in the position shown in Fig. 1, with the head of the screw b in the short arm of the L-shaped slot on, it cannot be turned; but by pulling the ring E and sleeve G out against the spring S the head of the screw 1) enters the long arm of the slot m, so that the sleeve G can be turned. By turning the sleeve G, the

cams 7c and 6 act upon the surfaces of the lugs c and d and force the covers 0 and I) open. The sleeve is then returned to the position Fig. 1, when the backs can be closed again.

It will be noticed from the above descri r tion that, in addition to my improved means for opening the covers, means are provided for operating the stem winding mechanism-- namely, the knob F and the shank a-and also the usual means for opening the front by pushing the knob inward, so that the flange j of the cylinder I forces the spring it toward the center of the case.

The above description refers to my invention as applied to the case of a stem-winder.

sists, essentially, in the combination of awatchcase with its cover or covers and with a hollow stem, a cam-cylinder located within the hollow stem, and means for retaining the cylinder in its place and forturning it from the outside, for the purpose of bringing the cams in operation.

The means for turning the canrcylinder may be varied according to circumstances. \Vhen the knob is required for winding, the sleeve H and ring Eare used. In key-winders the knob 1* may be used for operating the cam-cylinder.

Having fully described my invention, wh it I desire to claim and to secure by Letters Patent is 1. The combination, with the watch-case, of the attached tubular stem, the cylinder arranged to rotate within said stem, and having at its inner extremity a cam or cams, and means connecting with the cylinder from the exterior of the hollow stem to rotate the cylinder within the stem, substantially as described.

2. The combination, with the watch-case, of the attached tubular stem, the hollow cylinder arranged to rotate within said stem, and having at its inner extremity a cam, a shank extending through the cylinder and carrying the knob or ball, and means connecting with the cylinder from the exterior of the hollow stem to rotate the cylinder within the stem, substantially as described.

3. The combination ofthc body of a watchcase with one or more covers and with a hollow stem, a cylinder located within the hollow stern, and provided with one or more cams which act against a surface or against surfaces of the cover or covers, a sleeve placed upon the stem and connected with the cylinder, and means for retaining the cylinder and the sleeve in place, while allowing them to be turned for bringing the cams into operation,substantially as and for the purpose specified.

it. The combination of the bod y A of awatchcase with one or more covers and with a hollow stem, H, a cylinder, I, located within the hollow stem H, and provided with one or more cams, 76 t, which act against suitable surfaces of the cover or covers, a ring, J, with projecting arms, and with notches for the lugs Z of the cylinder I, a sleeve, G, with notches h to receive the projecting arms of the ring J, and with a slot m, a knob, F, shank a, and screw 1), constructed and operating substantially as specified.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

CHARLES SOHUETZ.

Vitnesses:

A. FABER no Flinn, GEORGE WERNER. 

